Fixes for wxQt build under Cygwin

Include the missing headers, notable QtGui/QFont from wx/fontutil.h which uses
a QFont object.

Closes #16750.

src/qt/listctrl.cpp

@@ -8,12 +8,20 @@
 // For compilers that support precompilation, includes "wx.h".
 #include "wx/wxprec.h"
 
+#ifdef __BORLANDC__
+    #pragma hdrstop
+#endif
+
+#include <QHeaderView>
+
+#ifndef WX_PRECOMP
+    #include "wx/bitmap.h"
+#endif // WX_PRECOMP
+
 #include "wx/listctrl.h"
 #include "wx/imaglist.h"
 #include "wx/qt/private/winevent.h"
 
-#include <QHeaderView>
-
 
 class wxQtTreeWidget : public wxQtEventSignalHandler< QTreeWidget, wxListCtrl >
 {